# Think You Know Depth Of Field? Online Quiz Will Make Your Brain Hurt

With so many photographers entering the movie-making scene with DSLRs that shoot HD video, understanding depth of field has become crucial for keeping moving subjects in critical focus. In this online test from blackandblue.com, your knowledge is put to the test with 10 basic concept questions, and then 10 scenario questions. Post your score in the comments and tell us what you thought of it.

100% here :) My HS Math teacher would be proud.

60% (D-)

75% the first part 100% in the second part do my best guest work (that wasn't the best)

60%! No bad! The second part ... WOW!

got a C, 75% :)

C-, 70%. I could have whipped out my DoF calculator app on my phone for the second part, but just guessed based on what I estimated the film/sensor size would be.

60%...phew that second part was difficult.  haven't used any of those cameras

B- (80%)

Ok....85%(B) even thou i just guessed answer after the 12th question in part two..... hehehe :D

I got 85% (B), pretty straightforward, I'm not a professional nor a professor of physics.

80%.  I got all of the first ten questions right but the practical section was a series of guesswork based on what I perceived the sensor sizes might be.

ouch 65% not used to anything but regular 35mm film and to be honest not much video just photography so lot of guesing on the second part.. LOL..

Hey Mike -- I'm Evan Luzi the editor/author of The Black and Blue and just wanted to stop by to say thanks for posting about the quiz and to thank all F Stoppers who went over and gave it their best shot.

By no means is the test easy, so if you're scoring above 50% you're doing fairly well! Especially since most of you aren't video/film guys.

That said -- I'm gonna work on adding metric measurements to the second half later today based on the feedback here.

70% (C-) , as with others guess work in part 2.

I feel bad commenting here seeing all ur scores..30% epic fail :(

Yeah, really not a test for photographers who don't know about the sensor size of these fancy movie cameras. Hard to know if its cropped or full-frame so we are pretty much guessing. Also - that man, are we trying to get his full body in focus? with how much negative space above and below him? BLEH!

Got 100%...up until I quit on question 14.  Hard to stay interested in scenarios with no personal relevance.

B- 80% not too shabby

I scored 70% C-, well I don´t undertand all expresions in english... jijiji

90. Maybe it helps I do this every day anyways.

they need to be more precise... Question #4 1/3-2/3 for normal lenses, macro is 1/2-1/2. Adding a filter...What kind of filter...I know it doesn't change the answer but it would have trick even more people.

80% B-

I got 75% (C), and I teach photography :) lol

i think that the guys of fstoppers should post their scores jajaja ;)

70 % . first part perfect. second educated guess. I call that "Not bad"

60% it is a shame, i though that i was more instructed on this, but with out the camera in my hand i could not measure the DoF in some cases, and also mix the hyper with the super focal, need to go back to basics

70%%  yeah!

F   :(

40% but thats ok.....Never shot video before

Fail!!! Hehe... Sorry but test it´s useless...

I got 80%... I just guesstimated, I didn't get the calculator out...